<?php // $Id: new_statement.class.php,v 1.5 2007/10/10 05:25:23 nicolasconnault Exp $

///////////////////////////////////////////////////////////////////////////
//																	   //
// NOTICE OF COPYRIGHT												   //
//																	   //
// Moodle - Modular Object-Oriented Dynamic Learning Environment		 //
//		  http://moodle.com											//
//																	   //
// Copyright (C) 1999 onwards Martin Dougiamas		http://dougiamas.com  //
//		   (C) 2001-3001 Eloy Lafuente (stronk7) http://contiento.com  //
//																	   //
// This program is free software; you can redistribute it and/or modify  //
// it under the terms of the GNU General Public License as published by  //
// the Free Software Foundation; either version 2 of the License, or	 //
// (at your option) any later version.								   //
//																	   //
// This program is distributed in the hope that it will be useful,	   //
// but WITHOUT ANY WARRANTY; without even the implied warranty of		//
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the		 //
// GNU General Public License for more details:						  //
//																	   //
//		  http://www.gnu.org/copyleft/gpl.html						 //
//																	   //
///////////////////////////////////////////////////////////////////////////

/// This class will ask for one statement type and table
/// to be able to add sentences of that type

class new_statement extends XMLDBAction {

	/**
	 * Init method, every subclass will have its own
	 */
	function init() {
		parent::init();

	/// Set own custom attributes

	/// Get needed strings
		$this->loadStrings(array(
			'statementtype' => 'xmldb',
			'statementtable' => 'xmldb',
			'create' => 'xmldb',
			'back' => 'xmldb'
		));
	}

	/**
	 * Invoke method, every class will have its own
	 * returns true/false on completion, setting both
	 * errormsg and output as necessary
	 */
	function invoke() {
		parent::invoke();

		$result = true;

	/// Set own core attributes
		$this->does_generate = ACTION_GENERATE_HTML;

	/// These are always here
		global $CFG, $XMLDB, $db;

	/// Do the job, setting result as needed
	/// Get the dir containing the file
		$dirpath = required_param('dir', PARAM_PATH);
		$dirpath = $CFG->dirroot . stripslashes_safe($dirpath);

	/// Get the correct dirs
		if (!empty($XMLDB->dbdirs)) {
			$dbdir =& $XMLDB->dbdirs[$dirpath];
		} else {
			return false;
		}
		if (!empty($XMLDB->editeddirs)) {
			$editeddir =& $XMLDB->editeddirs[$dirpath];
			$structure =& $editeddir->xml_file->getStructure();
		}
	/// ADD YOUR CODE HERE
		$tableparam = optional_param('table', NULL, PARAM_CLEAN);
		$typeparam = optional_param('type', NULL, PARAM_CLEAN);

	/// If no table or type, show form
		if (!$tableparam || !$typeparam) {
		/// No postaction here
			$this->postaction = NULL;
		/// Get list of tables
			$dbtables = $db->MetaTables('TABLES');
			$selecttables = array();
			foreach ($dbtables as $dbtable) {
				$dbtable = str_replace($CFG->prefix, '', $dbtable);
				$selecttables[$dbtable] = $dbtable;
			}
		/// Get list of statement types
			$typeoptions = array (XMLDB_STATEMENT_INSERT => XMLDBStatement::getXMLDBStatementName(XMLDB_STATEMENT_INSERT),
								  XMLDB_STATEMENT_UPDATE => XMLDBStatement::getXMLDBStatementName(XMLDB_STATEMENT_UPDATE),
								  XMLDB_STATEMENT_DELETE => XMLDBStatement::getXMLDBStatementName(XMLDB_STATEMENT_DELETE),
								  XMLDB_STATEMENT_CUSTOM => XMLDBStatement::getXMLDBStatementName(XMLDB_STATEMENT_CUSTOM));
			if (!$selecttables) {
				$this->errormsg = 'No tables available to create statements';
				return false;
			}
		/// Now build the form
			$o = '<form id="form" action="index.php" method="post">';
			$o .= '<div>';
			$o.= '	<input type="hidden" name ="dir" value="' . str_replace($CFG->dirroot, '', $dirpath) . '" />';
			$o.= '	<input type="hidden" name ="action" value="new_statement" />';
			$o.= '	<input type="hidden" name ="postaction" value="edit_statement" />';
			$o.= '	<table id="formelements" class="boxaligncenter" cellpadding="5">';
			$o.= '	  <tr><td><label for="type" accesskey="t">' . $this->str['statementtype'] .' </label>' . choose_from_menu($typeoptions, 'type', '', 'choose', '', 0, true) . '<label for="table" accesskey="a">' . $this->str['statementtable'] . ' </label>' .choose_from_menu($selecttables, 'table', '', 'choose', '', 0, true) . '</td></tr>';
			$o.= '	  <tr><td colspan="2" align="center"><input type="submit" value="' .$this->str['create'] . '" /></td></tr>';
			$o.= '	  <tr><td colspan="2" align="center"><a href="index.php?action=edit_xml_file&amp;dir=' . urlencode(str_replace($CFG->dirroot, '', $dirpath)) . '">[' . $this->str['back'] . ']</a></td></tr>';
			$o.= '	</table>';
			$o.= '</div></form>';

			$this->output = $o;


	/// If table, retrofit information and, if everything works,
	/// go to the table edit action
		} else {
		/// Get some params (table is mandatory here)
			$tableparam = required_param('table', PARAM_CLEAN);
			$typeparam  = required_param('type', PARAM_CLEAN);

		/// Only insert is allowed :-/
			if ($typeparam != XMLDB_STATEMENT_INSERT) {
				$this->errormsg = 'Only insert of records is supported';
				return false;
			}

		/// Calculate the name of the statement
			$typename = XMLDBStatement::getXMLDBStatementName($typeparam);
			$name = trim(strtolower($typename . ' ' . $tableparam));

		/// Check that this Statement hasn't been created before
			if ($structure->getStatement($name)) {
				$this->errormsg = 'The statement "' . $name . '" already exists, please use it to add more sentences';
				return false;
			}

		/// Create one new XMLDBStatement
			$statement = new XMLDBStatement($name);
			$statement->setType($typeparam);
			$statement->setTable($tableparam);
			$statement->setComment('Initial ' . $typename . ' of records on table ' . $tableparam);
		/// Finally, add the whole retroffited table to the structure
		/// in the place specified
			$structure->addStatement($statement);
		}

	/// Launch postaction if exists (leave this here!)
		if ($this->getPostAction() && $result) {
			return $this->launch($this->getPostAction());
		}

	/// Return ok if arrived here
		return $result;
	}
}
?>
